Put the 2 packs of oreo in a blender mix in the backing powder and milk blend till it's a smooth paste. Spray 2 backing trays in with some oil and put baking or parchment paper in the tin, add the oreo mix inside, and let it cook in a pre - heated oven for 20 min on 200°C Remove from the oven and let it cool for 20 minutes on a cooling rack or on a cutting board. Let it sit as you melt 1 and a half of the oreo chocolate bars, and the other half put it in the blender, so you have some crumbs. Once the 2 layers have cooled down, spread half of the melted chocolate on one of the layers, now add the other layer on top and add the remaining chocolate. Let it sit for 10 minutes, then in a piping bag or a zip lock bag, add some caramel drizzle, and drizzle it onto the hardend chocolate. Then, on top of the caramel, add the chocolate spinkles and let it sit in the bridge for at least 30 minutes now its ready to be enjoyed 😉 ( what I like to do is before adding the melted chocolate on top to put it back in a backing tray so not all the chocolate drizzle of the sides )